The memory device is NEC uPD70F3556.
You can read NEC data flash and program key by OBD2 with VagTacho K+CAN with Fiat activation or with UPA-S, view the connection diagram.
The expected file size is 32768 or 65536 bytes.
The software shows a 5-digit PIN code.
Use the original Fiat remote key with Megamos Crypto 128-bit AES ID88 transponder.
The remote part is also programmed and operating.
The programmed key must be matched with the car using a diagnostic device.
Vehicles equipped with this unit:
Fiat:500X, Tipo, Egea
Jeep: Renegade